Drainage Services in Contra Costa & Alameda
Dunn Company's earthwork expertise includes drainage work for new sites as well as repair of existing drainage systems.

To prevent further erosion, a surface drainage culvert will be installed in this gully.

Here the culvert is in place and the crew is preparing to backfill the excavation.
Slope Stabilization Slide Show
View a series of photos taken at a recent job site where a tennis court was threatened by an unstable adjacent slope.
The drainage services in Contra Costa includes:
French Drains / Subsurface Drainage
Surface Drains
Downspout / Gutter Tie Ins
Yard Re-Grading
Concrete and Asphalt Removal
Sump Excavation
You can consult our drainage services in Alameda for more information or set your schedule accordingly.